Add RDS Subnet groups

moto/rds/exceptions.py

@@ -29,3 +29,10 @@ class DBSecurityGroupNotFoundError(RDSClientError):
         super(DBSecurityGroupNotFoundError, self).__init__(
             'DBSecurityGroupNotFound',
             "Security Group {0} not found.".format(security_group_name))
+
+
+class DBSubnetGroupNotFoundError(RDSClientError):
+    def __init__(self, subnet_group_name):
+        super(DBSubnetGroupNotFoundError, self).__init__(
+            'DBSubnetGroupNotFound',
+            "Subnet Group {0} not found.".format(subnet_group_name))

moto/rds/models.py

@@ -4,7 +4,7 @@ import boto.rds
 from jinja2 import Template
 
 from moto.core import BaseBackend
-from .exceptions import DBInstanceNotFoundError, DBSecurityGroupNotFoundError
+from .exceptions import DBInstanceNotFoundError, DBSecurityGroupNotFoundError, DBSubnetGroupNotFoundError
 
 
 class Database(object):
@@ -118,11 +118,42 @@ class SecurityGroup(object):
         self.ip_ranges.append(cidr_ip)
 
 
+class SubnetGroup(object):
+    def __init__(self, subnet_name, description, subnets):
+        self.subnet_name = subnet_name
+        self.description = description
+        self.subnets = subnets
+
+        self.vpc_id = self.subnets[0].vpc_id
+
+    def to_xml(self):
+        template = Template("""<DBSubnetGroup>
+              <VpcId>{{ subnet_group.vpc_id }}</VpcId>
+              <SubnetGroupStatus>Complete</SubnetGroupStatus>
+              <DBSubnetGroupDescription>{{ subnet_group.description }}</DBSubnetGroupDescription>
+              <DBSubnetGroupName>{{ subnet_group.subnet_name }}</DBSubnetGroupName>
+              <Subnets>
+                {% for subnet in subnet_group.subnets %}
+                <Subnet>
+                  <SubnetStatus>Active</SubnetStatus>
+                  <SubnetIdentifier>{{ subnet.id }}</SubnetIdentifier>
+                  <SubnetAvailabilityZone>
+                    <Name>{{ subnet.availability_zone }}</Name>
+                    <ProvisionedIopsCapable>false</ProvisionedIopsCapable>
+                  </SubnetAvailabilityZone>
+                </Subnet>
+                {% endfor %}
+              </Subnets>
+            </DBSubnetGroup>""")
+        return template.render(subnet_group=self)
+
+
 class RDSBackend(BaseBackend):
 
     def __init__(self):
         self.databases = {}
         self.security_groups = {}
+        self.subnet_groups = {}
 
     def create_database(self, db_kwargs):
         database_id = db_kwargs['db_instance_identifier']
@@ -173,6 +204,26 @@ class RDSBackend(BaseBackend):
         security_group.authorize(cidr_ip)
         return security_group
 
+    def create_subnet_group(self, subnet_name, description, subnets):
+        subnet_group = SubnetGroup(subnet_name, description, subnets)
+        self.subnet_groups[subnet_name] = subnet_group
+        return subnet_group
+
+    def describe_subnet_groups(self, subnet_group_name):
+        if subnet_group_name:
+            if subnet_group_name in self.subnet_groups:
+                return [self.subnet_groups[subnet_group_name]]
+            else:
+                raise DBSubnetGroupNotFoundError(subnet_group_name)
+        return self.subnet_groups.values()
+
+    def delete_subnet_group(self, subnet_name):
+        if subnet_name in self.subnet_groups:
+            return self.subnet_groups.pop(subnet_name)
+        else:
+            raise DBSubnetGroupNotFoundError(subnet_name)
+
+
 rds_backends = {}
 for region in boto.rds.regions():
     rds_backends[region.name] = RDSBackend()

moto/rds/responses.py

@@ -1,6 +1,7 @@
 from __future__ import unicode_literals
 
 from moto.core.responses import BaseResponse
+from moto.ec2.models import ec2_backends
 from .models import rds_backends
 
 
@@ -94,6 +95,27 @@ class RDSResponse(BaseResponse):
         template = self.response_template(AUTHORIZE_SECURITY_GROUP_TEMPLATE)
         return template.render(security_group=security_group)
 
+    def create_dbsubnet_group(self):
+        subnet_name = self._get_param('DBSubnetGroupName')
+        description = self._get_param('DBSubnetGroupDescription')
+        subnet_ids = self._get_multi_param('SubnetIds.member')
+        subnets = [ec2_backends[self.region].get_subnet(subnet_id) for subnet_id in subnet_ids]
+        subnet_group = self.backend.create_subnet_group(subnet_name, description, subnets)
+        template = self.response_template(CREATE_SUBNET_GROUP_TEMPLATE)
+        return template.render(subnet_group=subnet_group)
+
+    def describe_dbsubnet_groups(self):
+        subnet_name = self._get_param('DBSubnetGroupName')
+        subnet_groups = self.backend.describe_subnet_groups(subnet_name)
+        template = self.response_template(DESCRIBE_SUBNET_GROUPS_TEMPLATE)
+        return template.render(subnet_groups=subnet_groups)
+
+    def delete_dbsubnet_group(self):
+        subnet_name = self._get_param('DBSubnetGroupName')
+        subnet_group = self.backend.delete_subnet_group(subnet_name)
+        template = self.response_template(DELETE_SUBNET_GROUP_TEMPLATE)
+        return template.render(subnet_group=subnet_group)
+
 
 CREATE_DATABASE_TEMPLATE = """<CreateDBInstanceResponse xmlns="http://rds.amazonaws.com/doc/2014-09-01/">
   <CreateDBInstanceResult>
@@ -171,3 +193,31 @@ AUTHORIZE_SECURITY_GROUP_TEMPLATE = """<AuthorizeDBSecurityGroupIngressResponse
     <RequestId>6176b5f8-bfed-11d3-f92b-31fa5e8dbc99</RequestId>
   </ResponseMetadata>
 </AuthorizeDBSecurityGroupIngressResponse>"""
+
+CREATE_SUBNET_GROUP_TEMPLATE = """<CreateDBSubnetGroupResponse xmlns="http://rds.amazonaws.com/doc/2014-09-01/">
+  <CreateDBSubnetGroupResult>
+    {{ subnet_group.to_xml() }}
+  </CreateDBSubnetGroupResult>
+  <ResponseMetadata>
+    <RequestId>3a401b3f-bb9e-11d3-f4c6-37db295f7674</RequestId>
+  </ResponseMetadata>
+</CreateDBSubnetGroupResponse>"""
+
+DESCRIBE_SUBNET_GROUPS_TEMPLATE = """<DescribeDBSubnetGroupsResponse xmlns="http://rds.amazonaws.com/doc/2014-09-01/">
+  <DescribeDBSubnetGroupsResult>
+    <DBSubnetGroups>
+    {% for subnet_group in subnet_groups %}
+        {{ subnet_group.to_xml() }}
+    {% endfor %}
+    </DBSubnetGroups>
+  </DescribeDBSubnetGroupsResult>
+  <ResponseMetadata>
+    <RequestId>b783db3b-b98c-11d3-fbc7-5c0aad74da7c</RequestId>
+  </ResponseMetadata>
+</DescribeDBSubnetGroupsResponse>"""
+
+DELETE_SUBNET_GROUP_TEMPLATE = """<DeleteDBSubnetGroupResponse xmlns="http://rds.amazonaws.com/doc/2014-09-01/">
+  <ResponseMetadata>
+    <RequestId>6295e5ab-bbf3-11d3-f4c6-37db295f7674</RequestId>
+  </ResponseMetadata>
+</DeleteDBSubnetGroupResponse>"""